Type-bar and bearing therefor.



A. W. CHAMBERLIN.

TYPE BAR vAND BEARING THEREFOR. APPLICATION FILED MAR so, 1908.

91 3,200. Patented Feb. 23, 1909.

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ARTHUR WEBBER CHAMBERLIN, OF NEW YORK, N. Y.

TYPE-BAR AND BEARING- 'rnnnnron.

Specification of Letters Patent.

Patented. Feb. 23, 1909.

Application filed March 30, 1908. Serial No. 424,211.

To all whom it 111% concern:

Be it known t at I, ARTHUR WEBBER "C AMBERLIN, a citizen of the UnitedStates,

" and a resident of New York city, borough of Brooklyn, in the county ofKings and State of New York, have invented certain' new; and usefulImprovements in Type-Bars and Bearings Therefor,-of which the follow- 7in is afspecification.

y invention relates to an antifriction bearing for a type bar or similardevice 1'e-.

qnmng accurate alinement, and the prinicipal object is to produce acheap and efii' clent'bearin'g adapted to be automatically .ti'ghtened.by movement of the type bar.

whenever'it works loose.

The nature of the invention will be more fully understood from the foreoing descrip- -.tion thereof in connection wit the accom- ..2o

panying drawings, in which- Figure 1 is a side elevation, and Fig. 2 a

' top plan view of the type bar and bearing,

Fig. 3 is a detail view showing the portion of the bearingearried by thetype bar, Figs. 4 and .5 are detail views of one of the journal members,Fig. 4 being a section on'the line 3'-3 of Fig. 5..

The stationary member 1 of the bearing is supiported by a hanger 2,which is secured to a e sired stationary portion of the ty e -f writer.The

of stamped s formed with a protecting wall 3 and a convex pivotalsurface 4. A similar, but symmetricallyformed bearing member 5, alsopreferabl' sta'mped from sheet steel is revide' with a similar sideprotectin we. 14 and ivot'al bearing surface 15. 'T ese t'wo mem ers 1and 5 are'securedtogether by 'means of a screwfi, so as to form betweenthem an annular groove'or depression having parallel annular protectingwalls as'well as central. pivotal surfaces adapted to engage and support.the bearing formed on the end 7 of the type bar 8.- If desired, theprotecting angular portions 3, 14 may be omitted. ..-The type barbearing in 7 is preferably cufs 9, 9, 9, spaced e uidistantly about one81 e of the inner perip ery thereof, and cups I10, 10, 10, on'theotherside, also equidistant "from each other and circumferentiallyequidistant from the cups 9, 9, 9. All ofthe on s '9 and 10 aresolocated as to expose the balls ope of the .cone 1.

Iparts l and 2 are prefera 1y eet steel, the portion 1 beinginade fromhardened steel and formed with,

19, 20 contained therein bearin relation to the laterally inclined orcone pivotal surfaces 4', 15, of the parts 1,5.

The type bar 8 with balls of suitable size arranged in the cups 9 on oneside and cups e p 10 on the other, are held in position by t cone 5,which is secured to 1 by means of the 'screwbolt 6, the. end portion ofwhich is screw threaded: into cone 5. The shank ad-.

jacent the head is accurately fitted into the The lockin key 12, drivenmto a hole bored-longitudina ly of the screw so as to form an open slotin the periphery thereof, is preferably of soft metal so that it may behammered and expanded after pro er adjustment of. the parts has beenmae, thus locking the screw 6 so as to preventit from turning Withrespectto the cone 1. The cone 5 is purposely made capable of rotarymovement onthe screw thread of 6,

so as to permit of the automatic adjustment hereinafter described. Theautomatic adjustment iseffected by means of a lug 13 formed on or proecting from the peripheryof the adjusting cone 5. This lug 13 projectsradially adjacent the path of movement of the conical head 24 of a screw25 mounted on one side of the type bar 8.

In operation, the head 24 of the screw 25 will engage the pro'ection 13on the adjusting cone 5, when t e bearing wears enough to permit anyside play of the type bar 8. When such side lay does. occur, the head'24of the screw 25, y engaging the said projection 13, will turn theadjusting cone 5, which will screw inwardly on the thread of the screw6-until the bearing is tightened and the side, lay of the type bar 8 iseliminated. It will e understood that the initial adjustment of thecones and of the screw 6 prior to locking by the .soft metal key 12, wasinitially such as to'cause the head of the screw to normally pass by theside of 13, barely grazing the same when the bearing is tight and en.gaging the same enough to retighten whento the normally inoperativeposition of the I ened sufficiently to permit of side play of the is Itype bar, .substantially as described.

type bar. As the head of the screw 14 conical, however, it will presenta new enga ing point to the projection on adjusting cone 5 wheneverthere is enough side play to the ty l e' bar 8 to permitsuch engagement.

he screw 6 which connects the stationary cone 1 with the adjusting cone'5, is threaded and fitted very accurately. It has a broad head in orderto resist the downward strain on the bearing when the typewriter key isde ressed to lift the ty e bar.

t will be 'understoo that the rojection 16 on the rear end of the ty ebar caring is for engagement with the lin whereby it is operativelyconnected with the typewriter key. If there is any difference in thepull of the link, so that-the lateral play of the type bar tends to oneside rather than to the other, the screw head 24 and the lug 13 will belocated on that side of the bar toward which the bar tends to move whenit has any side play. In effecting the final adjustment of the bearing,the screw 6 will be tightened sufiiciently to bring the balls 19, 20into lateral bearingupon the inner walls of cones. 1 and 5, and theprecise relation of the screw head 24 with respect to the lug 13 may bevaried by filing ofl the engaging portions of either or by screwing inor out the screw 25. In the latter case, I may use washers of differentthicknesses, the various sizes differing by say of an inch, or I may usea yielding washer of spring metal or of yielding materials. 1

While I have herein fully shown and described, and have pointed out inthe appended claims certain novel features of construction, arrangementand operation which characterize my invention, it will be understood bythose skilled in the art that various omissions, substitutions, andchanges in the forms, pro ortions, sizes, and details of the device .anof its operation, may be made without departing from the spirit of myinvention.

I claim:

1. A type bar and a bearing therefor having ivotal and lateral bearingsurfaces, in

com ination with meansfor tightening said bearing by side play of thetype bar, substantially as described. v

' 2. A type bar and abearing therefor having ivotal andlateral bearingsurfaces, in com ination with a projection onthe type bar adapted toengage a. screw threaded member to tighten said bearing when loos- 3. Atwo part cone bearing, in combination with a type bar formed withpockets and provided with balls in said pockets adapted to oppositelyengage oppositely converging surfaces of said cone bearing, togetherwith means for tightening said bearing, said means being 0 eratedthrough side play of the type bar w r en the bearingis loose, substantially as described.

4. A two part cone bearing, in combination with atype bar formed. withpockets and provided with balls in said pockets adapted to oppositelyengage oppositely converging surfaces of said cone bearing, togetherwith means operated by side play of the type bar for screwing up saidbearing when the latter becomes loosened sufiiciently to permit suchside play'of said type bar, substantially as described.

5. A two part bearing comprising a stationary member and a rotatablemember having a screw threadedconneetion there with, in combination witha type bar pivoted upon said bearing and adapted to cooperate with saidrotatable member of said bearing, the location and arrangement of-theparts being such that the type bar will engage and screw up said movablebearing whenever there is side play of said. type bar, substantially asdescribed.

6. A type bar and bearing adapted-to be tightened by movementlongitudinally of its axis, in combination with means for tighteningsaid bearing by side play of the type bar.

7. A type bar and bearingadapted to be tightened by movementlongitudinally of its axis, in combination with a projection on the typebar adapted to engage a screw threaded member to tighten said bearingwhen loos ened sufficiently to permit side play'of the type bar,substantially as described.

8. A type bar and bearing adapted to be tightened by movementlongitudinally of its axis, in combination with means forefi'ecting saidmovement, the parts being relatively proportioned and arranged so that1novc-' ment of the type bar when loose,- operates to tighten saidbearing.

Signed at New York city, in the county of New York and State of New Yorkthis 26th day of March, A. 111908. I

ARTHURv WEBBER CHAHBERLIN.

Witnesses IRVING M. OBRIEGHT, ANITA BURKE.

